Physicochemical investigation of pure cadmium hydroxide Cd(OH)2 and Cd(OH)2–CdO composite material deposited by pneumatic spray pyrolysis technique

This paper investigates the physicochemical properties of pure Cd(OH) 2 and Cd(OH) 2 –CdO composite materials in depth. The cadmium sulfate octahydrate (3CdSO 4 .8H 2 O) is used as a precursor for the first time in this work and never been used in previous works involving cadmium-based materials. Ad...

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Veröffentlicht in:Applied physics. A, Materials science & processing Materials science & processing, 2022-06, Vol.128 (6), Article 512
Hauptverfasser: Naas, Abderrahmane, Chetoui, Abdelmounaim, Ghalouci, Lahouari, Khelladi, Mohamed Redha
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Chetoui, Abdelmounaim
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description This paper investigates the physicochemical properties of pure Cd(OH) 2 and Cd(OH) 2 –CdO composite materials in depth. The cadmium sulfate octahydrate (3CdSO 4 .8H 2 O) is used as a precursor for the first time in this work and never been used in previous works involving cadmium-based materials. Additionally, we present the first synthesis of Cd(OH) 2 –CdO by pneumatic spray pyrolysis deposition technique. Five cadmium hydroxide–oxide films are coated by spray pyrolysis on glass substrates by varying the solution concentration (0.025 M, 0.05 M, 0.1 M, 0.2 M, and 0.3 M). According to the structural characterization, the molarity has a clear impact on the formation of pure Cd(OH) 2 or Cd(OH) 2 –CdO phase mixture. The UV–Vis spectrophotometry reveals the high film transparency of ~ 90% in the visible region. The calculated optical bandgap of Cd(OH) 2 and CdO for the various films corresponds well to the literature. The FTIR analysis reveals the characteristic bands of Cd–O and the presence of –OH groups as the main signature of Cd(OH) 2 . The elemental composition investigated by means of EDS confirms the presence of Cd and O. The photoluminescence characterization reveals the various electronic transitions within CdO, considered as an activator within the Cd(OH) 2 host matrix. For the lowest molarities, SEM micrographs reveal a distinct porous structure. The electrical measurements revealed that the films’ resistivity varies in the range (3–5.5) Ω.cm.
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The cadmium sulfate octahydrate (3CdSO 4 .8H 2 O) is used as a precursor for the first time in this work and never been used in previous works involving cadmium-based materials. Additionally, we present the first synthesis of Cd(OH) 2 –CdO by pneumatic spray pyrolysis deposition technique. Five cadmium hydroxide–oxide films are coated by spray pyrolysis on glass substrates by varying the solution concentration (0.025 M, 0.05 M, 0.1 M, 0.2 M, and 0.3 M). According to the structural characterization, the molarity has a clear impact on the formation of pure Cd(OH) 2 or Cd(OH) 2 –CdO phase mixture. The UV–Vis spectrophotometry reveals the high film transparency of ~ 90% in the visible region. The calculated optical bandgap of Cd(OH) 2 and CdO for the various films corresponds well to the literature. The FTIR analysis reveals the characteristic bands of Cd–O and the presence of –OH groups as the main signature of Cd(OH) 2 . The elemental composition investigated by means of EDS confirms the presence of Cd and O. The photoluminescence characterization reveals the various electronic transitions within CdO, considered as an activator within the Cd(OH) 2 host matrix. For the lowest molarities, SEM micrographs reveal a distinct porous structure. 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The calculated optical bandgap of Cd(OH) 2 and CdO for the various films corresponds well to the literature. The FTIR analysis reveals the characteristic bands of Cd–O and the presence of –OH groups as the main signature of Cd(OH) 2 . The elemental composition investigated by means of EDS confirms the presence of Cd and O. The photoluminescence characterization reveals the various electronic transitions within CdO, considered as an activator within the Cd(OH) 2 host matrix. For the lowest molarities, SEM micrographs reveal a distinct porous structure. 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The elemental composition investigated by means of EDS confirms the presence of Cd and O. The photoluminescence characterization reveals the various electronic transitions within CdO, considered as an activator within the Cd(OH) 2 host matrix. For the lowest molarities, SEM micrographs reveal a distinct porous structure. The electrical measurements revealed that the films’ resistivity varies in the range (3–5.5) Ω.cm.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><doi>10.1007/s00339-022-05570-5</doi><orcidid>https://orcid.org/0000-0002-5685-7893</orcidid></addata></record>
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subjects Applied physics
Cadmium
Characterization and Evaluation of Materials
Composite materials
Condensed Matter Physics
Electrical measurement
Glass substrates
Machines
Manufacturing
Materials science
Nanotechnology
Optical and Electronic Materials
Oxide coatings
Photoluminescence
Photomicrographs
Physics
Physics and Astronomy
Processes
Spectrophotometry
Spray pyrolysis
Structural analysis
Surfaces and Interfaces
Thin Films
title Physicochemical investigation of pure cadmium hydroxide Cd(OH)2 and Cd(OH)2–CdO composite material deposited by pneumatic spray pyrolysis technique
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